Electric machine tool



l. NEWMAN ELECTRIC MACHINE TOOL. APPLICATION FILED MAYI0, 192I. 1,431,?49 Patented 001;. 10, 11322,

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ELECTRIC MACHINE TOOL. APPLICATION FILED MAYIO, 1921.

lASLMQQ Patented Oct. 10,1922,

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BYfi ATTORNEY The circuit for the motor is controlled Patented Get. 10, 1922. I H

UNITED STATES PATEM FUSE.)

ISIDOR NEWMAN, OF NEW YORK, N. Y.

ELECTRIC MACHINE TOOL.

Application filed May 10, 1921. Serial No. 468,363.

To all whom it may concern: ator. Any suitable bearing may be provided Be it known that I, ISIDOR NEWMAN, a citito take the thrust of spindle 5 by bearing zen of the United States, and resident of sleeve 4. I have shown the lower end of ew York City, borough of Manhattan, in spindle 5 enlarged at 5 to bear against the county of New York and State of New washer 5 at the lower end of sleeve 4. Sleeve ork, have invented certain new and useful 4 at its upper end carries a housing 11 which Improvements in Electric Machine Tools, of may be detachably secured by screws 12. which the following is a specification. lVithin housing 11 an electric motor 13 is y invention has for its object to provide supported, the conductor wires or cable 14 amachine tool having a longitudinally movfor the motor circuit entering the housing able drive spindle rotative by means of an through suitable openings. The motor drive electric motor, the circuit of which motor is shaft 13* is provided with a gear 15 to drive open when the tool is not in use, with means the spindle 5. I have shown gear 15 in mesh to close said circuit when the spindle is adwith a gear 16 on a shaft 17 journaled on a vanced to the work and to break the circuit support 18 secured in housing 11 (Fig. 3). when the spindle is returned to the idle posi- Shaft 17 has a gear 19 in mesh with an intion. ternal gear 20 secured at the upper end of A further object is to provide a spring to spindle 5 above sleeve 4 within housing 11. automatically return the spindle to the idle The housing, motor and gearing rise and deposition, and retain it there, with means to scend with sleeve 4 and spindle 5 when actupermit adjustment of the tension of the ated by gear 8. The lower end of spindle 5- spring as may be required. is adapted for connection with any suitable y invention comprises novel details of tool, such as a drill, or a can capping tool improvement that will be more fully hereindicated at 21. A detachable shank 22, inafter stated and then pointed out in the threaded to connect with spindle 5, connects claims. tool 21 thereto. The spindle may carry a Reference is to be had to the accompanyclutch for a drill or other tool in a well ing drawings forming part hereof, whereknown manner.

Figure l is a side view of my improved with the up and down movement of spindle machine tool; Fig. 2 is a front view there- 5. Secured upon shaft 9 is a circular insulatof; Fig. 3 is an enlarged detail view partly ing block 23, which may be detachably sein section,- Fig. 4 is a side view, partly in cured by nut or screw 24. Upon insulation section on line 4, 4 in Fig. 5; Fig. 5 is a plan 23 is secured a metal contact 25, having its view, partly in section on line 5, 5 in Fig. 4; ends suitably spaced apart (F igs. 3 and 5). Fig. 6 is a detail side view, looking from Contacts 26,27 are adapted to engage insuthe right in Fig. 2. lation 23 and contact 25. Contacts 26, 27 are Similar numerals of reference indicate corsupported by insulation 28, secured upon responding parts in the several views. bracket 29, attached to frame 1. Conductors A suitable frame 1 may be supported in 14 for the motor terminals connect with conany desired manner, as upon a tandard 2, tacts 26, 27, and a contact 30 on insulation 28 clamping means 3 on said frame securing it connects with the conductors 14 (Fig. 5). in any desired position on the standard. hen sp ndle 5 is raised in the normal or Frame 1 has a vertical bearing 1 slidably. idle position the contacts 26, 27 will rest on receiving a guiding sleeve 4 having a vertical insulation 23, and the motor circuit will be hearing bore 4 within which is journaled a broken. When sleeve 4 and spindle 5 are spindle 5. The bearing portion 1 is shown advanced to the work or lowered a suitable split at l and provided with screws 6 wheredistance by rotation of shaft 9 the insulation by the hearing may be adjusted to the sleeve 23 and contact 25 will be rotated to engage 4. or the latter may be rigidly clamped in contact 25 with contacts 26,27 and the motor the bearing. Sleeve 4 may be raised and circuit will be closed. Said circuit will relowered, to feed the spindle, by means of main closed while the tool is in use. When rack teeth 7 on the sleeve engaging a pinion the spindle is returned nearly to the idle or 8 on a shaft 9 journaled transversely in normal position the contact 25 will pass from frame 1. A handle or bar 10 on shaft 9 perthe contacts 26, 27, and will rest on insulamits ready rotation of the latter by the opertion 23, and the motor circuit will be broken.

said cover. '36 to lock it to shaft 9.

The insulation 23, 28, and the aforesaid contacts may be protected by a cover 31, detachably secured thereover by screws 32, on frame 1, (Fig. 1).

In order to retain the spindle 5 in the normal or idle position, and return the spindle thereto if released, I provide a spring 33, preferably like a clock spring, shown within a barrel or drum 34 secured on frame 1 by screws 35, on the side opposite the aforesaid insulation and contacts, (Figs. 4 and 5). Spring 33 is secured at one end 33 to barrel 34 and at the other end 33 to shaft 9. A sleeve 36 on shaft 9 is provided with a flange 36 having spaced notches 36", (Fig. 4). A cover member 34, loose on sleeve 36, fits over the outer end of barrel 34, and is provided with an internal pin or projection 37 to fit in either of the notches 36 of flange 36. Cover 34 has a projection 34 to engage a stop 34 on barrel 34. Cover 34 has a screw 38 (Fig. 5) to fit in a groove 39 m sleeve 36, to retain the cover in position, the shaft 9 and sleeve 36 being rotative Within Bar 10 passes through sleeve The tension of spring 33 may be regulated by holding shaft 9, withdrawing screw 38, sliding cover 34 along the shaft to release pin 37 from a notch 36 of flange 36, rotating the cover or the shaft, the required amount, entering the pin in a desired notch 36, restoring screw 38 in groove 39, and allowing projection 34" to engage stop 34 to retain flange 36 with spring 33 under the desired tension.

An adjustable stop 40, shown in the form of a screw, is carried by the projecting portion 41 of a collar 41. The collar 41 is shown of the split variety retained clamped upon sleeve 4 by screws 42. The collar as well as screw 40 may be adjusted along sleeve 4, the screw 40 being adapted to engage the frame 1 to limit the feed of spindle 5 to the. work. The collar and stop may be removed to permit the spindle to have additional feeding movement.

My improved tool will be found of for various purposes, since the feed of the spindle 5 to and from the work controls the operation of the motor, effecting a saving in electric current, the return of the spindle from the work each time cutting off the current which will not flow until the spindle is advanced a suitable distance to the work. In case the operator releases shaft 9, when the spindle is advanced, the spring 33 will automatically return the spindle to idle position by operating shaft 9, gear 8 and sleeve 4, thereby causing contact 25 to break the motor circuit at 26, 27, reducing danger from careless operation of the tool.

Changes may be made in the details of construction set forth, within the scope of the appended claims, without departing from the spirit of my invention.

utility Having now described my invention, what I claim is:

1. The combination frame supported by and extending from the standard, a sleeve slidably carried by the frame, means supported by the frame to reof a standard, a I

ciprocate the sleeve, a spindle rotative in the sleeve, a motor supported by the sleeve, and connecting means between the motor and the spindle for rotating the latter by the former.

2. The combination of a standard, a frame supported by and extending from the standard, a sleeve slidably carried by the frame, means supported by the frame to reciprocate the sleeve, a spindle rotative in the sleeve, a motor supported by the sleeve, and gearing between the motor drive shaft supported by said sleeve for rotating the spindle by the motor.

3. The combination of a standard, a frame supported by and extending from the standard, a sleeve slidably carried by the frame, means supported by the frame to reciprocate the sleeve, a spindle rotative. in the sleeve, a motor supported by the sleeve, a gear upon the spindle above the sleeve, a gear upon the motor shaft, and gearing supported by the sleeve in mesh with the first named gears for rotating the spindle by the motor.

4. The combination of a standard, a frame supported by and extending from the standard, a sleeve slidably carried by the frame, and provided with a rack, a shaft carried by the frame and having a gear in mesh with the rack to reciprocate the sleeve, a spindle rotative in the sleeve, a housing supported on the sleeve, a motor supported within the housing and having a gear, a gear upon the spindle within the housing, and gearing carried by the housing in mesh with said gears.

5. The combination of a frame, a sleeve slidably carried by the frame and provided with a rack, a spindle rotative within the sleeve, a motor and gearing supported by the sleeve to rotate the spindle, a shaft having a gear in mesh with said rack, and circuit controlling means controlled with said shaft to open and close the motor circuit.

6. The combination of a frame, a spindle carried thereby for rotary and longitudinal motion, a motor and driving connection therefrom to the spindle, a shaft, gearing controlled by the shaft to move the spindle longitudinally, a circuit for the motor, contacts for the circuit, insulation carried by the shaft, and a contact carried by said insulation to engage the first named contacts when the spindle is advanced to the work, said contacts being out of engagement when the spindle is retracted.

7. The. combination of a frame, a spindle,

means slidably and rotatively supporting the spindle on the frame, a shaft journaled on the frame, a spring connected to the shaft and to the frame to rotate the shaft, and means to adjust the tension of the to limit rotation of spring, and stop means the spring.

the shaft by e combination of a frame,aspindle,

9. The combination of a frame, a spindle, means slidably and rotatively supporting the spindle on the frame, a shaft journaled on the f a barrel on the frame, a spring Within the barrel secured to the lathousing.

Signed at New York City, in the county of New York, and State of New York, this 9th day of May, AD. 1921.

ISIDOR NEXVMAN.

jection to engage said recesses, means between said member and the frame to control the position of said member. 

